521361001432417 has 2 divisors, whose sum is σ = 521361001432418. Its totient is φ = 521361001432416.

The previous prime is 521361001432409. The next prime is 521361001432463. The reversal of 521361001432417 is 714234100163125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 294623630476816 + 226737370955601 = 17164604^2 + 15057801^2 .

It is a cyclic number.

It is not a de Polignac number, because 521361001432417 - 2³ = 521361001432409 is a prime.

It is a super-2 number, since 2×521361001432417² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 521361001432417.

It is not a weakly prime, because it can be changed into another prime (521361001432217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260680500716208 + 260680500716209.

It is an arithmetic number, because the mean of its divisors is an integer number (260680500716209).

Almost surely, 2^{521361001432417} is an apocalyptic number.

It is an amenable number.

521361001432417 is a deficient number, since it is larger than the sum of its proper divisors (1).

521361001432417 is an equidigital number, since it uses as much as digits as its factorization.

521361001432417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 521361001432417 in words is "five hundred twenty-one trillion, three hundred sixty-one billion, one million, four hundred thirty-two thousand, four hundred seventeen".